Add warp effect when user is in magnification mode

When user is single finger panning in magnified view and hits one of the
horizontal edges magnified view will scale out. When fully scaled out it
will transition to delegating state

Test: manual
Bug: 278271684, 279498927
Change-Id: I3c8896956279592e5360eed8830c5a3b3fdbb425
(cherry picked from commit a1fbfa60124229118be1d1b06d73ba2ee6b80991)